Manuals / Netopia / Computer Equipment / Barcode Reader

Netopia 4753 manual Nested IP Subnets, Internet

Models: 4753

1 282

Download 282 pages 1.6 Kb

Page 251

Understanding IP Addressing B-11

Nested IP Subnets

Under certain circumstances, you may want to create remote subnets from the limited number of IP addresses issued by your ISP or other authority. You can do this using connection proﬁles. These subnets can be nested within the range of IP addresses available to your network.

For example, suppose that you obtain the Class C network address a.b.c.0 to be distributed among three networks. This network address can be used on your main network, while portions of it can be subnetted to the two remaining networks.

Note: The IP address a.b.c.0 has letters in place of the ﬁrst three numbers to generalize it for this example.

The ﬁgure shows a possible network conﬁguration following this scheme. The main network is set up with the Class C address a.b.c.0, and contains Router A (which could be a Netopia 4753), a Netopia 4753, and a number of other hosts. Router A maintains a link to the Internet and can be used as the default gateway.

Internet

a.b.c.16

a.b.c.1

Router A

a.b.c.0

a.b.c.2

Router B

Router C

a.b.c.128

a.b.c.129

a.b.c.248

a.b.c.249

Image 251

Netopia 4753 manual Nested IP Subnets, Internet

Contents

Netopia Shdsl Integrated Access Device Part Number Contents Part II Advanced Configuration Contents Vi Administration Guide Contents Snmp Part III Appendixes Administration Guide Part I Getting Started Administration Guide Overview Features and CapabilitiesChapter Introduction How to Use This Guide Definition of Terms Chapter Setting Up Internet ServicesEndorsements Deciding on an ISP Account Finding an Internet Service ProviderUnique requirements Pricing and supportSmartIP Setting up a Netopia 4753 account Obtaining an IP addressObtaining Information from the ISP Local LAN IP address information to obtainWithout Network Address Translation Find a Location Chapter Making the Physical ConnectionsWhat You Need Telecommunication Installation Cautions Important Safety instructions10/100 Ethernet port Identify the Connectors and Attach the CablesNetopia 4753 Status Lights Administration Guide Chapter Sharing the Connection Dynamic conﬁguration recommended Conﬁguring TCP/IP on Windows-based ComputersStatic conﬁguration optional Add. Repeat this process for the secondary DNS TCP/IP Conﬁguring TCP/IP on Macintosh ComputersTCP/IP or MacTCP Sharing the Connection Administration Guide Chapter Connecting to Your Local Network Readying Computers on Your Local Network Telephone Extension ports Connecting to an IP and Telephone NetworkAdministration Guide Chapter Console-Based Management Snmp Simple Network Management Protocol. See Snmp on Connecting through a Telnet SessionConﬁguring Telnet software Connecting a Console Cable to Your Device Mac ANSI, VT-100, or VT-200 PC ANSI-BBSNavigating through the Console Screens Administration Guide Accessing the Easy Setup console screens Chapter Easy SetupEasy Setup Console Screens Screen similar to the following Main Menu appears See Appendix A, Troubleshooting, for more suggestionsLLC Snap Quick Easy Setup Connection PathAdministration Guide DSL Line Conﬁguration Voice Easy Setup Easy Setup Proﬁle IP Easy Setup Easy Setup Security Conﬁguration Previous Screen To Main Menu Introduction Chapter Voice ConfigurationVoice Conﬁguration screen appears Configuring the Voice FeaturesVoice Configuration Voice Gateway Administration Guide Part II Advanced Configuration Administration Guide Chapter WAN and System Configuration WAN Conﬁguration ConfigurationSetup Multiple ATM PVC overview Multiple ATM Permanent Virtual Circuit SupportSelect Display/Change Circuit and press Return Multiple ATM PVC configurationSetup DSL Line Configuration Changing a circuit Administration Guide Choosing Add Circuit displays the Add Circuit screen Adding a circuitSelect VC Trafﬁc Statistics Monitoring multiple virtual circuitsATM VC Statistics screen appears Commit Creating a New Connection ProﬁleDatalink PPP/MP Options Data Compression 0.0 Default Profile Default Proﬁle screen appears WAN Default ProﬁleFor details on setting up IP Parameters see IP Setup on IP Parameters Default Proﬁle screenNavigating through the System Conﬁguration screens ATMP/PPTP Default ProﬁleSystem Conﬁguration Screens System Conﬁguration Features Date and time Network Time Protocol Network protocols setupFilter sets IP address servingMM/DD/YY Console conﬁguration Logging Upgrade feature setSnmp Simple Network Management Protocol SecurityPPP PAP Installing the Syslog clientAdministration Guide Chapter IP Setup IP Setup IP Setup IP subnets For example Static routes Viewing static routes Static Routes screen will appearAdding a static route Deleting a static route Rules of static route installationModifying a static route Main Menu System Configuration IP Address Serving IP Setup Dhcp NetBios Options Serve Bootp Clients IP Address Pools Administration Guide Dhcp NetBIOS Options NetBios Type More Address Serving Options Select Release BootP Leases and press ReturnConﬁguring the IP Address Server options Scroll UP 192.168.1.112 192.168.1.113 Scroll Down Lease Management 192.168.1.101 Dhcp Dhcp Relay Agent IP Address Serving IP Address Serving Mode Connection Proﬁles Easy-PAT List WAN Configuration Administration Guide Chapter Multiple Network Address Translation FeaturesStatic mapping Following is a general description of these featuresPort Address Translation Server listsWAN Network Complex maps Supported trafﬁc Server Lists and Dynamic NAT conﬁguration Easy Setup Proﬁle conﬁgurationMultiNAT Conﬁguration Select Network Address Translation NAT and press Return NAT rules Network Address Translation screen appearsAdd NAT Public Range screen appears ADD NAT MAP Select Public Range Type is Pat Public Range Start Address is Show/Change NAT Map List screen appears Modifying map listsChange NAT MAP Moving maps Dynamic 206.1.1.252 192.168.1.252 Adding Server Lists ADD NAT Server Port Show/Change NAT Server List screen appears Modifying server listsChange NAT Server Deleting a server IP proﬁle parameters Binding Map Lists and Server Lists+--NAT Map List Name Toggle Address Translation Enabled to Yes IP Parameters WAN Default ProﬁleIP Parameters Default Profile NAT NAT AssociationsNAT Associations +NAT Map List Name-+ MultiNAT Conﬁguration Example Enter your ISP-supplied values as shown below Change NAT Public Range ADD NAT MAP Multiple Network Address Translation Administration Guide Chapter Virtual Private Networks VPNs Transit Internetwork Summary About Pptp TunnelsPptp conﬁguration Configuration Add Connection ProfileChap Administration Guide Conﬁguration About IPsec TunnelsDES Encryption Key Authentication Type Commit Cancel Advanced IP Proﬁle Options MS-CHAP V2 and 128-bit strong encryption Interoperation with other featuresEncryption Support ATMP/PPTP Default Answer Proﬁle QuickView VPN QuickViewWindows Dial-Up Networking for VPNWindows NT Windows Windows ME Atmp conﬁguration About Atmp TunnelsAtmp Tunnel Options Atmp Partner IP Address Allowing VPNs through a Firewall Pptp example on Atmp example on Pptp example Change Input Filter EnabledYes ForwardYes Source IP Address Change Output Filter EnabledYes ForwardYes Source IP Address Atmp example Source Port ID Dest. Port Compare Change Output Filter EnabledYes ForwardYes Source IP Address User Accounts Chapter SecuritySuggested Security Measures Protecting the conﬁguration screens Protecting the Security Options screenTelnet Access How ﬁlter sets work About Filters and Filter SetsWhat’s a ﬁlter and what’s a ﬁlter set? Forward Filter priorityPort numbers How individual ﬁlters workﬁltering rule Parts of a ﬁlterPort number comparisons Internet service TCP port161 Aurp AppleTalk 387 Who 513Transmission Control Protocol Other ﬁlter attributesPutting the parts together Internet Control Message ProtocolFiltering example #1 Disadvantages of ﬁlters Design guidelinesFiltering example #2 Working with IP Filters and Filter Sets An approach to using ﬁltersNaming a new ﬁlter set Adding a ﬁlter setAdding ﬁlters to a ﬁlter set Input and output ﬁlters-source and destinationNetopia R-Series Router ADD this Filter NOW Cancel Deleting ﬁlters Viewing ﬁlter setsViewing ﬁlters Modifying ﬁltersSample IP ﬁlter set Modifying ﬁlter setsDeleting a ﬁlter set TCP Icmp UDP Possible modiﬁcations Firewall Tutorial General ﬁrewall terms Example TCP/UDP Ports Basic IP packet componentsBasic protocol types Firewall Logic UDP Port ServiceFirewall design rules AurpEstablished connections Logical and functionImplied rules This is an example of the Netopia IP ﬁlter set screen Filter basicsExample IP ﬁlter set screen Example Example ﬁltersExample network Example Example LAN IP Filtersets Advanced Security Options Security Databases Security Radius Client Support Radius client configuration1812 Continue Cancel Radius Server is available to authenticate you Administration Guide Quick View Status Overview Chapter Monitoring ToolsISP General statusStatus lights Current statusEvent Histories Statistics & LogsWAN Event History Device Event History Voice Logs Voice Accounting Log IP Routing Table Served IP Addresses General Statistics Network Interface Physical InterfaceSnmp System InformationCommunity strings Snmp Setup screenSnmp traps Deleting IP trap receivers Setting the IP trap receiversViewing IP trap receivers Modifying IP trap receiversChapter Utilities and Diagnostics Ping Receive return Ping packet Stop Ping Trace RouteTelnet Client Disconnect Telnet Console Session Factory DefaultsUpdating ﬁrmware Transferring Conﬁguration and Firmware Files with TftpDownloading conﬁguration ﬁles Uploading conﬁguration ﬁles Transferring Conﬁguration and Firmware Files with Xmodem Downloading conﬁguration ﬁles Restarting the System Part III Appendixes Administration Guide Conﬁguration Problems Appendix a TroubleshootingNetwork problems Console connection problemsPower Outages How to Reset the Netopia 4753 to Factory DefaultsBefore contacting Netopia How to reach usNetopia Bulletin Board Service 1 Technical SupportFAX-Back Online product informationProduct information can be found in the following Administration Guide About IP Addressing What is IP?Appendix B Understanding IP Addressing Subnets and subnet masks Subnet masks Example Using subnets on a Class C IP internetISP Network Network conﬁgurationBackground Example Working with a Class C subnetDistributing IP Addresses 255.255.255.192 Technical note on subnet masking255.255.255.224 Dhcp address serving Netopia 4753 Dhcp server characteristicsServe dynamic WAN clients Using address servingManually distributing IP addresses MacIP servingUnderstanding IP Addressing B-9 Tips and rules for distributing IP addressesDhcp example Internet Nested IP SubnetsWAN Packet header types BroadcastsAdministration Guide Appendix C Binary Conversion Table Decimal Binary Appendix D Further Reading Administration Guide No August Further Reading D-3Administration Guide Environment Appendix E Technical Specifications and Safety InformationPower requirements DescriptionFCC Part 15 Class B Agency ApprovalsRegulatory notices North AmericaDeclaration for Canadian users Technical Speciﬁcations and Safety Information E-3Telecommunication Installation Cautions Netopia 4753 Speciﬁcations Physical interface Data featuresManagement Quality of serviceProtocols Pots support Voice featuresVoice feature support Hardware speciﬁcationsAdministration Guide Glossary Administration Guide Glossary Remapping See network number remapping Glossary Administration Guide Numerics IndexAccount types 2-2 information to obtain Index-2Index-3 Event history 14-5 statistics Index-4Index-5 Index-6 Limited Warranty and Limitation of Remedies Administration Guide